2023-2024 Overwintering population declined another 59% since last year. This year’s eastern monarch population occupied only 0.9 hectares (2.2 acres) at their overwintering site. This is the second lowest number counted since monarch populations began being monitored more than 30 years ago – the lowest was 0.67 ha during the 2013–2014 overwintering season.
View World Wildlife Fund’s official article here.